shared calendar, outlook, exchange, office 365

i have 2 questions on outlook calendar

1) when opening  outlook calendar , when i create new meeting - in TO column when i write 1 user name  and check the scheduling assistant , it shows like greyed out.

but when i type the same user name first in scheduling assistant it shows his free busy correctly

and this is happening with 1 user only all other users when i type in TO column , in scheduling assistant it shows there free busy

i checked default permission - to be owner , also ran outlook.exe /cleanfreebusy

2) i just created one shared mailbox having my company's bank holiday details in it , i opened outlook web access with the new company holiday mailbox and under share calendar added 2 users to see if the bank holiday calendar shows  up, but it didnt show up.

anything i am missing as i didnt run any powershell command

nothing worked
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Shreedhar EtteCommented:
1. Remove the user from Outlook Auto suggestion and then try to create the meeting request.

2. Holiday list won't show up. However, If a particular day has holiday then it show.

Further you refer this article to understand:

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pramod1Author Commented:
regarding your point no. 1

how do i Remove the user from Outlook Auto suggestion ? would appreciate any steps to do this

regarding point no.2 , i am not referring to holiday list but the calendar itself , i am trying to share with 1 or 2 users

but it doesnt show up in their outlook calendar
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